Demountable rim



. LL. H. KRICKEL,

DEMOUNTABLE REM. I APPLICATION FILED NOV.26,1919. g g gqgg v Patented Dec. 28, 1920.

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I 5 ATTORNEYS LCUIS HART KRIGKEL, 0F MONROE, LQUISIANA.

DEMDUNTABLE RIM.

Specification of Letters Patent.

Pz ltented Dec. 25-5, 19 it Application filed November 26, 1919. Serial No. 340,885,

1/ '0 all whomz't may concern:

Be it known that I, LOUIS H. Karolina, a citizen of the United States, anda resident of Monroe, in the parish of Ouachita and State of Louisiana, have invented certain new and useful Improvements in Dem'ount able Rims, of which the following is a specification.

My invention relates to demountable rims.

An important object of my invention is to provide a. demountable rim which is positively supported and secured with its parts locked in assembled position, upon the wheel, but which may be readily removed from'the wheel and readily and easilydcmountcd.

Another object is to provide a demountable rim of great strength and durability, ready and reliable in operation, and easy and inexpensive to manufacture.

Other objects and advantages reside in the certain novel features of the construction, arrangementand combination. of parts, which will become apparent as the description proceeds, reference being had to the ac companying drawings forming a part of this specification, and in which:

Figure 1 is a side elevational view of my improved demountable rim assembled and in position on the wheel felly,

2 is a sectional view through the line 2-2 of 1, looking in the direction of the arrows,

Fig. 3 is an enlarged fragmentary detail view in side elevation showing the cooperation of the locking and impact lug,

at is a sectional view on the line 4-4 of Fig. 1,

Fig. 5 is a sectional View on the line 55 of Fig. 3,;

Fig. 6 is a detail perspective view of the locking plate,

Fig. 7 is a detail perspectivemiew of the locking pin.

Referring to the drawings, it will be seen that the letter A designates the telly associated in the usual manner with the wheel structure (not shown). The folly band B is mounted upon the folly and is provided with an integral outwardly and upwardly erg tending flange C. A demount-able rim indlcated generally at D is mounted upon the folly band and secured in spaced relation thereto in the usual manner by the conventional lock lugs E, and their bolts F, usually six in number, and the tire casing is mounted in the rim channel in the usual severe strains and not only the lock lugs and their bolts bent, and in some instances, snapped ofl but the rim has been distorted due to the excessive span both circiun'terential and lateral. One ot' the important tea-- tures of the present invention resides in the provision elf-means to overcome this diliiculty and bending or snapping oil of the .lock lugs and their belts well as distortion of the rim is thereby eitectnally prevented.

The demountablc rim D comprises outer and inner circumferential sections indicated at 10 and 11, respectively, the outer section being provided with an elongated cut-away portion 10 and the inner section beingipro vided with a semi-circular cutaway portion 11, to accommodate the valve stem of the tire (not shown) both in the assembled position of the sections and during the relative movement of the sections in their ope 'a'tion from release to locked position and vice versa, as will be hereinafter fully described.

The outer section 10 has secured thereto a plurality of locking pins 12 projecting radially inward from the under side of the rim section and. spaced equally about the circumln practice, it 1 ferential extent of the rim sect-ion. Each of I indi 1 cated generally at 13, adapted to cooperate with the locking pins 12 ot' the outer section to lock the sections together in assembled position. Each of the locking plates 13 comprises an inner portion 14 adapted to be riveted or otherwise secured to the inner section 11 and an outer portion 15 provided with a slot 16, the walls of which engage with the locking pin 12 after the pin has been entered into the slot. The walls of the slot are all vertical but the outer wall 16' veers outwardly toprovide an inclined plane or cam action on the locking; pin to draw the sections 10 and 11 together. lhe inner lav-- eted portionll istapered or of gradually 'jected only to compression strains.

increasing cross section from its inner .toward its outer end. This taper or increase of cross section continues from the inner end to approximately the middle of the locking plate from which point to the outer end thereof,-the locking plate is of uniform and relatively thick cross section. As shown, especially in Fig. 4, the uniform cross sectioned and relatively thick portion of the locking plate is. disposed to underlie the outer section 10 which section constitutes the outer portion of the rim. The tapered portion of the locking plate is disposed as shown in Fig. 4: to underlie the inner section 11 of the rim. The locking plates and pins are preferably six in number, and are arranged intermediate the lock lugs E and the outer thickened portion of the locking plate completely fills the space between the felly band B and the outer section 11 of the rim D and in this manner provides a positive support for the outer section, a supportwhich is subtapered portion 14 provides for the easy applying of the rim'on the wheel and the relatively slight circumferential extent of the locking plates offer verylittle frictional, resistance to the removal of the rim. It is to be noted also that not only is a positive support provided, but the span both circumferential and lateral has been cut in half.

The impact lugs 17 preferably three in number, are secured to the outer section 10 of the rim D and are arranged at equal angular distances about the center of the Wheel. These impact lugs are adapted to be impacted or struck by a hammer or like tool to induce movement of the section 10 with respect to the section ll, or in other words, to induce relative movement of the sections to thereby move the pins 12 with respect to the plate-13 to either cause the pins 12 to enter or leave the slots 16 of the plates 13 and so either to lock the section 10 to the section. 11 or to release the section 10 from the section 11. These impact lugs are preferably secured'tothc section 11 by being spot-welded thereto.

The lock lugs E and the impact lugs 17 are so arranged with respect to each other, that three of the locks-E are adapted'to bear against the impact lugs 17, one against each impact lag and thisprovides a positive lock against movement of the outer section 10 with respect to the innersection 11 to release the sect ons from each other when the rim is in assembled position upon the wheel.

In practice, if it is desirable to remove the rim the lock lugs E are taken oil. and the rim and tire may be easily pulled from the felly. The tire is then laid fiat, the operator stands The upon the casing F, if necessary, and the impact lug 17 is struck with a hammer or like tool to cause the outersection 10 to move in the direction indicated by the arrow in Fig. 3. This causes the lock pins 12 to leave the slots 16 of the locking plates 13, and when this occurs the sections 10 and 11 come apart easily and the tire is removed, repaired, and replaced, or a new tire is replaced if desired. The sections are then pressed together, with the locking pins adjacent the locking plates and the impact lug 17 is operated upon by the hammer to cause. the sections 10 to rotate in the opposite direction and so have the locking pins 12 enter the slots 16, to asseinble the rim, the inclined wall 16 of the slots drawing the sections tightly together.

The rim is then placed upon the telly and the lock lugs replaced to lock the same thereon, and the rim together in assembled posi.

tion, It is to be noted that the thickened Jortions of the lockim )late by su J Jortin l i l ll rinp; pins on the outer of said sections and locking plates on the inner of said sections having slots to cooperate with said pins, said locking plates having supporting 1701* tions adapted to underlie said outer section to present a positive structure between the peripheryof the wheel and the outer section to support said outer section and said locle ing plates l'ltlVlllQ tapering portions adapted to exert a wedging action to facilitate the assembly of the rim on the wheel.

2. A demountable rim including circumferential sections and interlocking means for said circumferential sections including loching pins on the outer of said sections and locking plates on the inner of said sections having slots provided with inclined walls a) cooperate with said pins to draw said sections together to form the rim, said locking plates having supporting portions adapted to underlie said outer sections to present a positive structure between. the periphery of the wheel and the outer section to. support said outer section and said locking plates having tapering portions adapted to exert a wedging action to facilitate the assembly of the rim on the wheel. 

